scholarly journals Electro-activity and magnetic switching in lanthanide-based single-molecule magnets

2019 ◽  
Vol 6 (12) ◽  
pp. 3398-3417 ◽  
Author(s):  
Olivier Cador ◽  
Boris Le Guennic ◽  
Fabrice Pointillart
Keyword(s):  
Magnetic Field ◽  
Single Molecule ◽  
Magnetic Behaviour ◽  
Light Irradiation ◽  
Redox Processes ◽  
Single Molecule Magnets ◽  
Magnetic Switching

The present work reviews switching of single-molecule magnetic behaviour achieved through various stimuli such as temperature, light irradiation, redox processes, solvation/desolvation, and magnetic field.

Cu(ii)–Dy(iii) and Co(iii)–Dy(iii) based single molecule magnets with multiple slow magnetic relaxation processes in the Cu(ii)–Dy(iii) complex

2015 ◽  
Vol 44 (29) ◽  
pp. 13242-13249 ◽  
Author(s):  
Malay Dolai ◽  
Mahammad Ali ◽  
Ján Titiš ◽  
Roman Boča
Keyword(s):  
Schiff Base ◽  
Single Molecule ◽  
Schiff Base Ligand ◽  
Magnetic Relaxation ◽  
Magnetic Behaviour ◽  
Dinuclear Complexes ◽  
Relaxation Processes ◽  
Single Molecule Magnets ◽  
Slow Magnetic Relaxation

Two CuII–DyIII and CoIII–DyIII dinuclear complexes of a Schiff base ligand (H3L) exhibit single-molecule magnetic behaviour with multiple slow magnetic relaxation processes for the former.

Magnetic field and dilution effects on the slow relaxation of {Er3} triangle-based arsenotungstate single-molecule magnets

2020 ◽  
Vol 49 (35) ◽  
pp. 12458-12465 ◽  
Author(s):  
Hanhan Chen ◽  
Lin Sun ◽  
Jinpeng Zhang ◽  
Zikang Xiao ◽  
Pengtao Ma ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Single Molecule ◽  
Magnetic Relaxation ◽  
Slow Relaxation ◽  
Relaxation Processes ◽  
Single Molecule Magnets ◽  
Thermally Activated ◽  
Slow Magnetic Relaxation ◽  
Dilution Effects

Triangular {Er3} cluster containing POM exhibits field-induced two thermally activated relaxation processes. Whereas, the diamagnetic dilution sample indicates slow magnetic relaxation with the QTM being partially suppressed.

Electromagnetic superradiance from single-molecule magnets in the presence of a classical driving magnetic field

2008 ◽  
Vol 77 (9) ◽  
Author(s):  
I. D. Tokman ◽  
V. I. Pozdnjakova ◽  
G. A. Vugalter ◽  
A. V. Shvetsov
Keyword(s):  
Magnetic Field ◽  
Single Molecule ◽  
Single Molecule Magnets

scholarly journals Pressure tunablity in ReX4based SMMs; A magnetostructural study

2014 ◽  
Vol 70 (a1) ◽  
pp. C903-C903
Author(s):  
Christopher Woodall ◽  
Francisco Jose Martinez Lillo ◽  
Martin Míšek ◽  
Alessandro Prescimone ◽  
Dave Allan ◽  
...  
Keyword(s):  
High Pressure ◽  
Magnetic Susceptibility ◽  
Hydrostatic Pressure ◽  
Single Molecule ◽  
High Hydrostatic Pressure ◽  
Magnetic Behaviour ◽  
Magnetic Interactions ◽  
Antiferromagnetic Coupling ◽  
X Ray Diffraction ◽  
Single Molecule Magnets

Since the discovery of Single-Molecule Magnets (SMMs) in 1993 there has been extensive interest in understanding, developing and tuning the nature of magnetic interactions within SMMs with the intention of gaining greater insight into the nature of these interactions.[1] Typically this is done synthetically using variations in ligand geometry and co-ordination environment to vary magnetic behaviour. More recently it has been demonstrated that high hydrostatic pressure are also an effective mechanism for "tuning" properties such as magnetic susceptibility in a variety of SMMs.[2] The number of studies utilising high hydrostatic pressure to investigate molecular magnetism is extremely limited due to their inherent difficulty however we report a new study investigating the pressure tunabilty of Re(IV) based SMMs. 4d and 5d metal ions such as Re are of interest due their enhanced magnetic exchanges relative to their 3d analogues and Re(IV) based complexes are of particular interest. Previous studies into [ReX6]2-(X = Cl, Br and I) anions demonstrate significant antiferromagnetic coupling, not transmitted through chemical interactions but rather through weak Re-X...X interactions in the solid state which may be easily perturbed at high pressure. [3] Therefore we report an investigation into the tunability of magnetic susceptibility in a variety of [ReX4] based compounds using high pressure magnetic susceptibility measurements and correlate the results with structure observations taken from high pressure single crystal X-ray diffraction experiments. The effects of the removal of solvent trapped in the lattice using temperature and vacuum and the corresponding effect on magnetic behaviour and chemical structure are also reported.

Magnetic-Field-Induced Freezing of Spin Correlations in Networked System of [Mn4] Single-Molecule Magnets

2008 ◽  
Vol 77 (7) ◽  
pp. 073708 ◽  
Author(s):  
Satoshi Yamashita ◽  
Tatsuya Fujisaki ◽  
Yasuhiro Nakazawa ◽  
Masaharu Oguni ◽  
Kazuya Nakata ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Single Molecule ◽  
Single Molecule Magnets ◽  
Spin Correlations ◽  
Networked System

Bis-phenoxido and bis-acetato bridged heteronuclear {CoIIIDyIII} single molecule magnets with two slow relaxation branches

2016 ◽  
Vol 45 (17) ◽  
pp. 7510-7520 ◽  
Author(s):  
Susanta Hazra ◽  
Ján Titiš ◽  
Dušan Valigura ◽  
Roman Boča ◽  
Sasankasekhar Mohanta
Keyword(s):  
Schiff Base ◽  
Crystal Structures ◽  
Single Molecule ◽  
Magnetic Behaviour ◽  
Slow Relaxation ◽  
Single Molecule Magnets

Crystal structures and single molecule magnetic behaviour of two bis(μ-phenoxido)–bis(μ-acetato) {CoIIIDyIII} complexes, derived from the hexadentate Schiff base N,N′-ethylenebis(3-ethoxy- or 3-methoxysalicylaldimine), are described.

scholarly journals Thermostability and photoluminescence of Dy(iii) single-molecule magnets under a magnetic field

2016 ◽  
Vol 7 (8) ◽  
pp. 5020-5031 ◽  
Author(s):  
Ye Bi ◽  
Cheng Chen ◽  
Yi-Fang Zhao ◽  
Yi-Quan Zhang ◽  
Shang-Da Jiang ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Single Molecule ◽  
Single Molecule Magnets

scholarly journals Incorporation of expanded organic cations in dysprosium(III) borohydrides for achieving luminescent molecular nanomagnets

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Wojciech Wegner ◽  
Jakub J. Zakrzewski ◽  
Mikolaj Zychowicz ◽  
Szymon Chorazy
Keyword(s):  
Magnetic Anisotropy ◽  
Single Molecule ◽  
Unit Cell ◽  
Organic Cations ◽  
Single Molecule Magnets ◽  
Higher Symmetry ◽  
Magnetic Switching ◽  
Unit Cells ◽  
Slow Magnetic Relaxation ◽  
Insight Into

AbstractLuminescent single-molecule magnets (SMMs) constitute a class of molecular materials offering optical insight into magnetic anisotropy, magnetic switching of emission, and magnetic luminescent thermometry. They are accessible using lanthanide(III) complexes with advanced organic ligands or metalloligands. We present a simple route to luminescent SMMs realized by the insertion of well-known organic cations, tetrabutylammonium and tetraphenylphosphonium, into dysprosium(III) borohydrides, the representatives of metal borohydrides investigated due to their hydrogen storage properties. We report two novel compounds, [n-Bu4N][DyIII(BH4)4] (1) and [Ph4P][DyIII(BH4)4] (2), involving DyIII centers surrounded by four pseudo-tetrahedrally arranged BH4– ions. While 2 has higher symmetry and adopts a tetragonal unit cell (I41/a), 1 crystallizes in a less symmetric monoclinic unit cell (P21/c). They exhibit yellow room-temperature photoluminescence related to the f–f electronic transitions. Moreover, they reveal DyIII-centered magnetic anisotropy generated by the distorted arrangement of four borohydride anions. It leads to field-induced slow magnetic relaxation, well-observed for the magnetically diluted samples, [n-Bu4N][YIII0.9DyIII0.1(BH4)4] (1@Y) and [Ph4P][YIII0.9DyIII0.1(BH4)4] (2@Y). 1@Y exhibits an Orbach-type relaxation with an energy barrier of 26.4(5) K while only the onset of SMM features was found in 2@Y. The more pronounced single-ion anisotropy of DyIII complexes of 1 was confirmed by the results of the ab initio calculations performed for both 1–2 and the highly symmetrical inorganic DyIII borohydrides, α/β-Dy(BH4)3, 3 and 4. The magneto-luminescent character was achieved by the implementation of large organic cations that lower the symmetry of DyIII centers inducing single-ion anisotropy and separate them in the crystal lattice enabling the emission property. These findings are supported by the comparison with 3 and 4, crystalizing in cubic unit cells, which are not emissive and do not exhibit SMM behavior.

Sign in / Sign up

Export Citation Format

Share Document